html{
    font-size:50px
}
body{
    font-size:24px
}

@media screen and (min-width:320px){
    html{
        font-size:21.33px  //320/15份
    }
    body{
        font-size:12px
    }
}

@media screen and (min-width:360px){
    html{
        font-size:24px
    }
    body{
        font-size:12px
    }
}
@media screen and (min-width:375px){
    html{
        font-size:25px
    }
    body{
        font-size:12px
    }
}
@media screen and (min-width:384px){
    html{
        font-size:25.6px
    }
    body{
        font-size:14px
    }
}
@media screen and (min-width:400px){
    html{
        font-size:26.67px
    }
    body{
        font-size:14px
    }
}
@media screen and (min-width:414px){
    html{
        font-size:27.6px
    }
    body{
        font-size:14px
    }
}
@media screen and (min-width:424px){
    html{
        font-size:28.27px
    }
    body{
        font-size:14px
    }
}
@media screen and (min-width:480px){
    html{
        font-size:32px
    }
    body{
        font-size:15.36px
    }
}
@media screen and (min-width:540px){
    html{
        font-size:36px
    }
    body{
        font-size:17.28px
    }
}
@media screen and (min-width:720px){
    html{
        font-size:48px
    }
    body{
        font-size:23.04px
    }
}
@media screen and (min-width:750px){
    html{
        font-size:50px
    }
    body{
        font-size:24px
    }
}